(-)-(1S,2R,3S,4S,5R,6S)-5-exo-azido-7-tert-butoxycarbonyl-2,3-exo-isopropylidenedioxy-6-endo-p-toluenesulfonyl-7-azabicyclo[2.2.1]heptane 在
偶氮二异丁腈 、
三正丁基氢锡 作用下,
以
甲苯 为溶剂,
以51 %的产率得到(1S,2S,6R,7S)-4,4-Dimethyl-3,5-dioxa-8,11-diaza-tricyclo[5.3.1.0
2,6]undec-8-ene-11-carboxylic acid tert-butyl ester